Question 1127760

***Corrected from previous request ***

In need of assistance please, as I am completely lost.

I was hoping to receive help understanding the following question:

A regression was run to determine whether there is a relationship between hours of TV watched per day(x)and number of sit-ups a person can do (y). The results of the regression are given below. Use this to predict the number of sit-ups a person who watches 11 hours of TV can do.

y=ax+b
a=-1.341
b=32.234
r=-0.896

What is really throwing me off is where "r" comes into play.

I am not simply seeking an answer, instead I am asking for your knowledge on how to understand this type of equation, and how to solve something such as this.

Thank you for your time!
<pre>I gave you the answer in your previous post explaining why "r" was given, and what you need to do in order to predict "y". 
Why are you re-posting the problem?